Alex Perry wrote:
> I don't know whether YASim models ground effect; if it does, the
> tailplane becomes more effective in ground effect and sucks the tail
> downwards.  That'll exacerbate the torque of the forward gear mounting
> position.

Oooh!  Good point.  YASim does indeed model ground effect (kinda
naively, but it's there), so this should really be happening.
Cool. :)

> It's just occurred to me that the taildrop of the landing may be
> increasing the AOA enough to put him on the back side of the lift
> curve in any case.

Also possible, although as I remember the DC-3 sits on its gear at
significantly less than the stall angle, so it should still see
increasing lift all the way to tailwheel touchdown.

> I know a couple of DC3 pilots; when you feel the model is as good as
> you can make it, I'll ask them to take it for a spin and give you a
> critique.

That would be pretty cool.  Some stuff, like the toe brake issue, is
going to be pretty much unfixable except by those with special
hardware.  But certainly prop wash should be modelled before calling
this thing "done".  Also, some of the statistics like the stall AoA
and engine power/RPM settings are still guesses; it would be nice to
come up with better numbers.

Andy

-- 
Andrew J. Ross                NextBus Information Systems
Senior Software Engineer      Emeryville, CA
[EMAIL PROTECTED]              http://www.nextbus.com
"Men go crazy in conflagrations.  They only get better one by one."
 - Sting (misquoted)


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